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FU RNACE-GRATE.

Specification forming part of Letters Patent No. 50,996, dated November 14, 1865.

To all whom 'it may concern Cologne, Prussia, haveinvented a new and use ful Improvement in Furuace-Grates, (for which Letters Patent were granted nie in England, hearing date the 20th of January, 156) lz) and l do hereby declare that the following is a full, clear, au d exact description thereof, which will enable others skilled in the art to make and use the saine, reference being had to the ac coxnpanying drawings, forming part ot' this specification, in which- Figure l represents a longitudinal vertical section of this invention. Fig. 2 is a l'ront elcvation oi" the saine.

Similar letters of reference indicate like parts.

Fire-gratos generally are so constructed that the fresh fuel is thrown upon that which is already undergoing combustion. The eliect 'lhelecf is as follows: Before thefresh fuel reaches the temperature requisite for combustion all water or moisture contained in the saine must be eraporated5 and in order to effeet this object portion ofthe heat created by the combustion of the incandescent fuel is consumed uselessly-thatis, it acts on a place where it is not needed,and therefore the teinperature of the tire is lowered. The atmospheric air, before it is allowed to reach the fresh fuel, is compelled to pass through the incandescent mass, where it is deprived of all, or nearly all, its oxygen, which reaches the fresh feelin the forni oihot carbonio acid, which 'takes up another atom ot' carbon and becomes carbonio oxide, thus consuming a quantity of fuel without producin gausefuletfect. Furthermore, another portion ofthe fuel (more or less, according to the nature of the fuel) is driven outin the form of vapor and of gases, which pass off unconsuined mixed with minute particles of coal, and commonly designated by the terni of smoke. These dil'ioulties areohriated by the grate which forms the subject-matter of this presentinvention, and which is so constructed that the fuel is introduced from behind i or under the incandescent mass already upon the grat-aand consequently all the gases arising from the fresh fuel. cannot escape uneonsuined, and the air requisite for the purpose oi' supporting combustion passes through the cold l fuel to the incandescent mass and no portion Be it known that l, EUGEN LANGEN, 0i`

ot' the fuel is wasted.

Bly grate is composed of threel (more or less) cast-iron plates, d d2 d3, which are supported b v lips or cleats, in., projecting from the inner sides of the side plates, a. vFrom thein` ner ends of the plates d' d2 d3 extend the air guiar gratebars c fg, which are provided at their under edges with notches that drop over the upper edges of cross-liars b, secured between the side plateot the furnace, and their .tails extend under the plates d' d2 d3, whereby they are rinly held in position. The bars of the lowest grate are straight and rest upon cross-bars c' and c2.

Under the grate-bars g is situated a movable trap-grate, z, which maybe made in two or more parts, and which turns .on suitable pivots, z', so that it can he turned down in a horizontal position, or that it can be brought in a vertical posit-ion, which it occupies in Fie'. 1 of the drawings. Said grate is operated hy means of two ormore rods, s, which connect with arms h, extending from the movable grateor gratos, so that by pushing said rods in the gratos are turned down, and by pulling said rods out the grates are turned upto a vertical position.

The operation is -as follows: Son'e 'coal is introduced upon each of the tiers d d2 d3 and pushed out upon the inner ends of the grate bars, and by placing a sufficient 4quantity 0iv lrindling-wood behind the coal oneach plate andlighting said wood the tire can be startedA JAfter the coals are fully ignited some more grate, where they are completely consumed.

No ashes fall through the gratos, since the same always collect in front and gradually descend with the burning coal to the lowest grate, whence they can be easily removed or. raked out when the trap-grate is let down.

It is obvious that the detects pointed out above are fullyobviated by this arrangement. l

sired description, and can also be used in Cornish boilers with great advantage.

What I claim as my invention, and desire to secure by Letters Patent, is

l A grate composed of three or more tiers, in combination with a fire-box and trap-grate, constructed and operatin g substantially as and for the purpose set forth.

The above specification of my invention sgnedby me this 13th day of April, 1865.

EUGEN LANGEN.

Vitnesses J. W. REHE, vO. REMY. 

